﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<body>
    <script>
        /*
         赋值运算 把数据赋值给变量的符号

         */

        let age = 2;
        age = age + 2;
        age += 2;
        console.log(age);
    </script>
</body>
</html>